Hmm! If she pays the manufacturer $T and sells for $1.3T (30% increase on T) then:
1.3T = 65
T = 65/1.3 → 50
T = $50
i.e. she pays the manufacturer $50 for each tool chest.
m is (y2 - y1)/(x2 - x1) asinus!
Press the 2nd button to see %
.
After it displays it's first result, hit the = button again. This usually results in it displaying the result in scientific notation.
If you click on the symbol to the right of the input bar on the home page calculator you get a drop down menu from which you can select fractions. This doesn't work as it should! I guess this is what the questioner is referring to.
Simply replace the C by 30:
9*30/5 + 32 → 9*6 + 32 → 54 + 32 → 86
So 30ºC is 86ºF
-8x^-1 → -8/x
-(8x)^-1 → -1/(8x)
Period of a sinusoid = 2pi/frequency
If you have a keyboard just use the ^ symbol, otherwise use the xy button.
Let x = 0.15151515....
100x = 15.15151515....
Subtract x from 100x
99x = 15
x = 15/99
x = 5/33
+33665 